Honda EU30is, Owner'S Manual, Page: 21 / 72

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Gasolines Containing Alcohol
Gasoline spoils very quickly depending on factors such as light
exposure, temperature and time.
In worst cases, gasoline can be contaminated within 30 days.
Using contaminated gasoline can seriously damage the engine
(carburetor clogged, valve stuck).
Such damage due to spoiled fuel is disallowed from coverage by the
warranty.
To avoid this please strictly follow these recommendations:
Only use specified gasoline (see page ).
If you notice any undesirable operating symptoms while using a
gasoline that contains alcohol, or one that you think contains
alcohol, switch to a gasoline that you know does not contain alcohol.
Before buying fuel from an unfamiliar station, try to find out if the
fuel contains alcohol, if it does, confirm the type and percentage of
alcohol used.
Honda cannot endorse the use of fuels containing methanol since
evidence of their suitability is as yet incomplete.
Fuel system damage or engine performance problems resulting
from the use of fuels that contain alcohol is not covered under the
warranty.
Do not use gasohol that contains more than 10% ethanol. Do not use
gasoline containing methanol (methyl or wood alcohol) that does not
also contain cosolvents and corrosion inhibitors for methanol. Never
use gasoline containing more than 5% methanol, even if it has
cosolvents and corrosion inhibitors.
If you decide to use a gasoline containing alcohol (gasohol), be sure its
octane rating is at least as high as that recommended by Honda. There
are two types of ‘‘gasohol’’: one containing ethanol, and the other
containing methanol.
If long storage (more than 30 days) is foreseen, drain fuel tank and
carburetor.
To slow deterioration, keep gasoline in a certified fuel container.
Use fresh and clean gasoline.
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